Holding device



H. M. MORROW April 25, 1944.

HOLDING DEVIQE Filed Feb. 12, 1943 .2 Sheets-Sheet 1 April25, 1944., HM Mom-Q5, 2,347,329

HOLDING DEVICE Filed Feb. 12, 1943 2 Sheets-Sheet 2 7 .17 I I: :37 l'lllli l l l l l l l l 36 16 INVENTOR.

Patented Apr. 25, 1944 UNlTED STATES ant-NT OFFI E HOLDING DEVICE,

Harry M; Morrow; Canton; Ohio, assignor -to The Bowdil Company Application February 12, 1943, Serial Not 1754537 6 Claims.

My invention relates in genera1 to a holding means and more particularly to a holding means for opposing the disengagement of a pin from the aligned holes of a hinged connection.

I have illustrated my invention in connection with a coal cuttin chain having 'pivotally connected elementsconneotedvtogether'by a pin, but it is to be understood that my invention-may be useful in connection-with-other types of pivot or hinge connections,

An object of my invention isthe provision of a holding means which opposesdisengagement of the pin from a pivot or hinge connection and which may be readily applied Without materially changing the construction and design of the connection parts.

Another objectof my invention is the provision of a holding means for opposing the disengagement of a pin in a hinge or pivot connection in which the holding means does not interfere with the ready assembly of the pin in thealigned holes of the connected parts.

Another object of my invention. is the provision of a holding means for a pin in a pivot or hinge connection whereby thepin may be knocked out by heavily striking the; same with a hammer or other suitable tool.

Another object of my invention is the provision of a holding means for a pin of a pivot or hinge connection which obviates the necessity of snugly pressing the pin in the aligned holes of ;the-connected parts for the full length of the pin.

Another object of my invention is the provision of a holding means for a pin in a pivot or hinge connection having a 'oushingwhereby the-holding means operates to keep the bushing from turning as well as to oppose the disengagement of the pin from the bushing. I

Another object of my invention is the provision of a holding means for securing a pin in an opening. 7

Another object of my invention is the provision of a holding means in the form of a rivet having a head which keys or locks a pin in an opening. Other objects and a fuller understandingof my invention may be had by referring to-the following description and claims taken in-combination with the accompanying drawings, in which:

Figure 1 is a side, elevational viewof two hinged elements of a mining machine chain embodying the holding means constituting my invention; Figure 2 is an enlargedcross-sectional and'fragmentary view taken along the. line 2-2 of Figure l and shows .the connecting pin and my, holding means in their assembled position;

Figure 3 is theside elevational view of m gholding means which is in the form of a rivet,tthe rivet being shown in its upset position in Figure 2 of the assembled connection;

Figure 4 is a view: similar to Figure 2 and shows the position of the rivet and the connecting pin during the initial stages of the assembly thereof in the chain. elements;

Figure 5 isafviewsimilar to Figures 2 and 4 and shows the connectingvpin fully pressed into the aligned openings of the connected-elements of the chain with the rivet ready for an upsetting operation;

Figure 6 an enlarged'fragmentary view showingv principally the mainaligned openings of the connecting elements of thev chain, together wit the secondary opening through which therivet passes; v

Figure '7 isan enlarged crossesectionaliand fragmentary view taken along the line 2-2 of Figure 1 andshowingtheeye portion of the chain connection; Y Figure '8 is a top view of the connecting pin; Figure 9 is a crossesectional view of the pin taken along the line 9-9 of FigureB;

Figure 10 is a top view of the rivet shown in Figure 3;

Figure 11 is aview similar to Figure 2, butshows in addition thereto a bushing having a'notch' in one edge thereof into which-asmall portion of the holdingrivet is depressed to keep the bushing from turning Figure 12 is a side view of the notched bushing used in Figure 11;

Figure 13 is a view similar to Figure 4, but shows a pin havinga key-way in the side thereof to receive the head of the holding rivet;

' Figure 14 isa view of 'the device in Figure 13, being si-milar'to the location of the-parts inFigure 5, and shows thehead of-the holding rivet locked in the key-way in the side of the pin;

:FigureI1'5 -is-another-view of the device in Figure 13, being similar to the location of the parts in Figure. 2, and shows-the holding rivet in its'final upset condition forholdingthe-pin in thehinge connection;

Figure 16 is a side view ,ofz the pin-used in Figures 13,;14-and l5. aportionibeingshown in section to illustrate the key-way;

Figure 17 is a plan view-ofthepin in Figure 16;

Figure-l8- is a side view of theiho-lding rivet used in Figures .3, M and 15; and

Figure l-is1 a plan view otthe holding rivet in Figure 18.

With reference to-Figured of the drawings, I

illustrate vtwo connected elements of .a mining machine cuttingchain illustrated generallysby the reference character I5. The chain is adapted to carry a suitable cutting bit [6 for cutting coal or other material. The bottom portion of the connected elements of the chain may be referred to as the chain portion and is designated generally by the reference character I"!. In the drawings, the chain portions are substantially identical, in that each portion comprises a yoke having two side members I8 and I9 and aneye portion 20 which fits between the two side members 18 and IQ of the yoke portion. The chain may be driven by a suitable driving sprocket indicated by the reference character 2|. The two side members [8 and IQ of the yoke portion and the eye-portion 20 are provided respectively with main openings 28,

29 and 30 arranged to receive a connecting pin 23. I

A bushing or hearing 22 fits within the. opening 30 of the eye-portion and in my embodiment of the invention the bushing or bearing 22 is free to rotate about the pin 23 and within the opening 30 in the eye-portion 20. 1

The holding means for opposing disengagement of the pin 23 from the alignedopenings of the side members 18 and IQ of the yoke portion and of the eye-portion 20, is in the form of a rivet 24 and has its head 25 cut away on one side as shown in Figures 3 and 10. The stem of the rivet 24 passes through a secondary opening 21 which forms a bay with respect to the main opening 28 in the side member 18 of the 'yoke portion of the chain.

As shown in Figure 2, 4 and 5, the underneath side of the side member IS in the vicinity of the secondary opening2'l is provided with a tapered recess to receive the head 25 0f the rivet, with the result that the exposed end of the head of the rivet lies substantially flush with the underneath side of the side member l8.' The eye-por tion 20 of the chain forms an anvil upon which the head of the rivet may rest while the stem is being upset. .The top of the side member l8 and the top of the connecting pin 23 in the vicinity surrounding the stem of therivet 24 is provided with a recess 26 to receive the upset end of the rivet 24.

In assembling the-two chain elements, the rivet 24 is first inserted in the secondary opening 21 and is held therein while the eye-portion 20 and the bushing 22 are inserted between the side members l8 and I9 of the yoke portion of the chain elements. The eye-portion 20 and the bushing 22 are slid under the head-25 of the rivet 24 until the bushing-22 is properly aligned with reference to the openings; 28 and 29 in the side members l8'and l9 of the yoke. The'pin 23 is next inserted inthe bushing 22 as indicated in Figure 4. At this point of the assembly, the pin 23 is pressed into the openings 28 and 29 by any suitable pressing means. That is to say, the pin 23 is snugly pressed into the openings 28 and 29, while it may freely pass through the opening in the bushing 22. Inasmuch as the bushing 22 is free to rotate about the pin 23 and'in the opening 3|] of the eye-portion 20, the wear upon the bushing 22 is completely around the bushing instead of being localized at one place as would be the case if the bushing 22 were not permitted to rotate. Accordingly, the elongation of the chain resulting from thewear of each bushing is reduced to a minimum.

After the pin 23 has been pressed into the side members I8 and [9 as shown in Figure 5, the next end of the pin 23 and thus opposes disengagement of the pin 23 from the aligned openings of the pivot connection. In actual service the overlapping portion of the upset end of the rivet is effective in preventing the pin 23 from becoming disengaged. However, in the event that it becomes necessary to disconnect the chain for repair or replacement of parts, the pin 23 may be knocked out of the aligned openings by striking the same with a hammer or other suitable tool. In driving out the pin 23 with the hammer, the overlapping portion of the rivet is pushed back to allow the pin to clear as it is driven out of the aligned holes. In practice the rivet serves as a very useful form of a holding means and may be readily applied to a chain without changing the design or construction of the chain.

In Figures 11 and 12, the bushing 3| has a notch 32 in the upper edge thereof and as the holding rivet 24 is upset a small portion 33 is caused to protrude into the notch 32 to keep the bushing 3! from turning with reference to the pin 23. In this embodiment, no relative movement occurs between the pin 23 and the bushing 3|, and thus relative movement is caused to take place between the bushing and the opening 30 in the eye-portion 20. This arrangement is useful in certain fields of application.

In Figures 13 to 19, I show a modification; of my invention in that the pin 34 has no head, but is provided with a key-way 35 in the side thereof to receive a square shouldered head 3'! of the holding rivet 36. The head 31 of the rivet has a which keeps the pin from rotating. The head 31 of the holding rivet 36 looks or keys the pin 34 against endwise movement.

Although I have described my invention with a certain degree of particularity, it is understood that the present disclosure'has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and the scope of the invention as hereinafter claimed.

I claim as my invention:

1. In combination with a member having a first and a second side and having a main opening extending therethrough from one side to the other and a pin fitting in the main opening with an exposed end of the pin lying substantially flush with the first side of the member, the said member also having adjacent one side of the main opening a secondary opening forming a bay therewith, of holding means to oppose disengagement of the pin from the main opening, said holding means including a rivet having a head engaging the second side of the member in the vicinity of the secondary opening and having a stem passing through the secondary opening and disposed adjacent the pin, said stem of the rivet being upset and overlapping a portion of the first side of the member and a portion of the exposed end of the pin to oppose disengagement of the pin from the main opening.

2. In combination with a member having a first and a second side and having a main openin extending therethrough from one side to the other and a pin fitting in the main opening with an exposed end of the pin lying substantially flush with the first side of the member, the said memher also having adjacent one side of the main opening a secondary opening forming a bay therewith, a holding means to oppose disengagement of the pin from the main opening, said holding means including a rivet having a head engaging the second side of the member in the vicinity of the secondary opening andhaving a stem passing through the secondary opening and disposed adjacent the pin, said stem of the rivet being upset and overlapping a portion of the first side of the member and a portion of the exposed end of the pin to oppose disengagement of the pin from the main opening, the second side of the member in the vicinity of the secondary opening being recessed to receive the head of the rivet and the first side of the member and said exposed end of the pin being jointly recessed to receive the upset end of the stem of the rivet.

3. In a chain having pivotally connected elements connected together by a pin, said pivotally connected elements having main openings aligned with each other through which the pin passes, one of said elements of the chain including a member having a first and a second side, said pin having an exposed end lying substantially flush with the first side of the member, the said memher also having adjacent one side of the main opening a secondary opening forming a bay therewith, of holding means to oppose disengagement of the pin from the main opening, said holding means including a rivet having a head engaging the second side of the member in the vicinity of the opening and having a stem passing through the secondary opening and disposed adjacent to the pin, said stem of the rivet being upset and overlapping a portion of the first side of the member and a portion of the exposed end of the pin to oppose disengagement of the pin from the main openings.

4. In a chain having pivotally connected elements connected together by a pin, said pivotally connected elements having main openings aligned with each other through which the pin passes, one of said elements of the chain including a member having a first and a second side, said pin having an exposed end lying substantially flush with the first side of the member, the said member also having adjacent one side of the main opening a secondary opening forming a bay therewith, of holding means to oppose disengagement of the pin from the main opening, said holding means including a rivet having a head engaging the second side of the member in the vicinity of the opening and having a stem passing through the secondary opening and disposed adjacent to the pin, said stem of the rivet being 'upset and overlapping a portion of the first side of the member and a portion of the exposed end of the pin to oppose disengagement of the pin from the main openings, the other of said elements of the chain having a bearing fitting in the main opening thereof and surrounding the pin, said bearing being free to rotate about the pin and in the main opening of the said other of said elements, said pin being snugly pressed in the main openings of the said one of said elements.

5. In a chain having pivotally connected elements connected together by a pin, said pivotally connected elements having main openings aligned with each other through which the pin passes, one of said elements of th chain including a member having a first and a second side, said pin having an exposed end lying substantially flush with the first side of the member, the said member also having adjacent one side of the main opening a secondary opening forming a bay therewith, of holding means to oppose disengagement of the pin from the main opening, said holding means including a rivet having a head engaging the second side of the member in the vicinity of the opening and having a stem passing through the secondary opening and disposed adjacent to the pin, said stem of the rivet being upset and overlapping a portion of the first side of the member and a portion of the exposed end of the pin to oppose disengagement of the pin from the main openings, said pin having a keyway to receive the head of the rivet.

6. In a chain having pivotally connected elements connected together by a pin, said pivotally connected elements having main openings aligned with each other through which the pin passes, one of said elements of the chain including a member having a first and a second side, said pin having an exposed end lying substantially flush with the first side of the member, the said memher also having adjacent one side of the main opening a secondary opening forming a bay therewith, of holding means to oppose disengagement of the pin from the main opening, said holding means including a rivet having a head engaging the second side of the member in the vicinity of the opening and having a stem passing through the secondary opening and disposed adjacent to the pin, said stem of the rivet bein upset and overlapping a portion of the first side of the member and a portion of the exposed end of the pin to oppose disengagement of the pin from the main openings, the other of said elements of thechain having a bushing fitting in the main opening thereof and surrounding the pin, said bushing having a notch to receive an upset portion of the rivet to keep the bushing from turning with reference to the pin.

HARRY M. MORROW. 

